I just had an error on a DS. It was a survey for a moisturizing product that requires watching several commercials, then re-watching the one of interest and one other (I'm sure you all know the kind I am talking about). I was evaluating the commercial of interest and received a message that the survey was now closed when I was about 15 minutes into it. I had already evaluated the commercial for several questions - I wasn't immediately directed to a closed survey - it apparently closed while I was doing it. I didn't get the Do Not Qualify page and didn't miss a QC question.